Eastman Kodak developed the Photo CD in 1992. It
has become a high-quality alternative to scanning. A Photo CD service
bureau can digitize your photographic film directly to a Photo CD
disc. The Photo CD discs can hold 100 high-resolution 35mm images.
The Kodak Pro Photo CD format uses the following formats: 120mm, 70mm,
35mm, and 4x5 inch. The images can be opened directly in Photoshop
for image editing.
In order to know which resolution to use in your
project, you must know the size of the image you need and the number
of pixels per inch required for output.
Inches (72 ppi)
|128 x 192
||1.75 x 2.0
|256 x 384
||3.5 x 5.33
|512 x 768
||7.1 x 10.6
|1,024 x 1,536
||14.2 x 21.3
|2,048 x 3,072
||28.4 x 42.7
(Pro Photo CD only)
Note: When you load
a Photo CD image, the Resolution field is automatically set
to 72 ppi.
Images on Photo CD are saved as RGB (Red, Green,
Blue) images. In order for them to be printed, they need to be converted
to CMYK (Cyan, Magenta, Yellow, and Black). The conversion can be
accomplished by using a "profile" available from Kodak,
which converts Photo CD files directly to CMYK color when the images